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Xiaomi Mi Mix 3 (128GB/6GB) vs Samsung Galaxy S21 FE (SM-G990U 128GB)

Side by side comparison between Xiaomi Mi Mix 3 vs Samsung Galaxy S21 FE phones, differences, pros, cons and full specifications. What's the better?

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Compare Samsung Galaxy S21 FE X Xiaomi Mi Mix 3 (128GB/6GB) 03Points
6.39"
AMOLED

1080x2340

12
MP

24mp

6GB
RAM

Octa-core

3200
mAh

(Non removable)

vs
26Points Samsung Galaxy S21 FE (SM-G990U 128GB) Compare Xiaomi Mi Mix 3 X
6.4"
AMOLED

1080x2400

12.2
MP

32mp

6GB
RAM

Octa-core

4500
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21 FE (SM-G990U 128GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

Mi Mix 3 (128GB/6GB)} 3 Advantages Xiaomi Mi Mix 3 (128GB/6GB) vs Galaxy S21 FE (SM-G990U 128GB)} 26 Advantages Samsung Galaxy S21 FE (SM-G990U 128GB)
+128GB (110GB available)13%
More internal storage for applications and files
vs128GB (97GB available)
+Aluminum body, glass front, ceramic backAdvantage
More resistant material
vsAluminum body, glass front, plastic back
+LED flash on both camerasAdvantage
The LED flash on both cameras helps in dark places or in low light
vsLED flash
2.8GHz 64bit Octa-core (10nm)vs+2.84GHz 64bit Octa-core (5nm)6%
More powerful processor, you can open your applications faster
6GB LPDDR4Xvs+6GB LPDDR5Advantage
This RAM type is better and more efficient.
UFS 2.1vs+UFS 3.1Advantage
Fastest write and read storage.
218 grams (7.63 ounces)vs+177 grams (6.2 ounces)23%
Lighter
8.5 millimeters (0.33 inches)vs+7.9 millimeters (0.31 inches)8%
Thinner
HDR8vs+HDR10+Advantage
The HDR10+ display provides vibrant colors and more details
60Hzvs+120Hz100%
The display reproduces more frames per second because the frequency (Hertz) is higher, improves fluidity and tires your eyes less.
1080x2340 pixelsvs+1080x2400 pixels3%
Higher resolution screen
403 PPIvs+411 PPI2%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
6.39"vs+6.4"1%
Larger screen
(dual camera) 12MP + 12MPvs+(triple camera) 12.2MP + 12MP + 8MP34%
Higher resolution main camera
1/2.55" inchesvs+1/1.76" inches45%
The larger sensor camera lets you take photos with better depth.
(dual front camera) 24MP + 2MPvs+(front) 32MP23%
Higher resolution secondary camera to take pictures and selfies
(front) Full HD (1920x1080)vs+(front) 4K UHD (3840x2160)3 times
More image quality for recording videos with the secondary camera
Android 10vs+Android 15Advantage
Android 15 is newer and safer
4G LTE-Avs+5G SA/NSAAdvantage
The 5G SA/NSA network is newer and faster
(4G LTE-A) 600 Mbpsvs+(5G SA/NSA) 2000 Mbps2 times
Faster for surfing the internet and download files
Not supportedvs+BarometerAdvantage
Sensors help you use the device
Virtual proximity sensorvs+Proximity sensorAdvantage
Sensors help you use the device
3200 mAhvs+4500 mAh41%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
18Wvs+25W39%
More power (watts) to charge the battery faster. Sometimes, the charger that comes with the device doesn't have the same power supported by the device. Check before you buy it.
Mono sound (not stereo)vs+Stereo soundAdvantage
Better sound quality for listening to music or clearer hands-free calls
802.11 a/b/g/n/ac [wifi5]vs+802.11 a/b/g/n/ac/ax [wifi6]Advantage
WiFi 802.11 a/b/g/n/ac/ax [wifi6] is newer and faster
Not supportedvs+DLNAAdvantage
With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.
USB 2.0 Type-C, USB OTG On-The-Govs+USB 3.2 Type-C, USB OTG On-The-GoAdvantage
Newer and faster USB version for transferring photos, mp3 or data.
Not supportedvs+IP68 certifiedAdvantage
Protection against water allows you talk to your friends in the rain, for example

30 Common items in both devices
Super AMOLED / Dynamic AMOLED
16 million
Digital and optical zoom
PDAF: phase detection autofocus
OIS (4-axis): Optical stabilization / OIS: Optical stabilization
BSI sensor
HDR photo on both cameras / HDR photo/video on both cameras
+23 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences Clear highlight

📱 Model features

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
ModelXiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
Other model names小米MIX 3, Xiaomi Mix 3 M1810E5AGalaxy S21 FE 5G SM-G990U1 (Snapdragon)
Country or region available(Global, International)China
(Global, International), China
USA
USA
BrandXiaomiSamsung
Release date11/1/2018, Announced: 10/1/20181/7/2022, Announced: 1/4/2022
Depth8.5 millimeters (0.33 inches)7.9 millimeters (0.31 inches)
Size (width x height)74.69 x 157.89 millimeters (2.94 x 6.22 in)74.5 x 155.7 millimeters (2.93 x 6.13 in)
Weight218 grams (7.63 ounces)177 grams (6.2 ounces)
Build, materialsAluminum body, glass front, ceramic backAluminum body, glass front, plastic back
Protection against water and othersNot supportedIP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant

📲 Display

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
Display typeSuper AMOLEDDynamic AMOLED
Screen size6.39" inches6.4" inches
Screen-to-body ratio~85% (screen-to-body ratio)~85.3% (screen-to-body ratio)
Display resolution1080x2340 pixels (19.5:9)1080x2400 pixels (20:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch 10-points
Pixel density (dot pitch)403 PPI411 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass 3Gorilla Glass Victus
Refresh rate60Hz120Hz
Display features600nits[typ]
HDR8
1300nits[peak]
HDR10+
Always-On Display

🤖 Operating System

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
System versionAndroid 9.0 PieAndroid 12
Firmware updateAndroid 10Android 15
User InterfaceMIUI 10 / 12One UI 4.1 / 5.1 / 6.0 / 7.0

⚙️ Processor

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
Chipset64bit: Qualcomm Snapdragon 845 (SDM845) (10nm)64bit: Qualcomm Snapdragon 888 (SM8350) (5nm)
CPUOcta-core, 2 processors:
4x 2.8GHz Kryo 385 Gold (Quad-core)
4x 1.7GHz Kryo 385 Silver (Quad-core)
Octa-core, 3 processors:
1x 2.84GHz Kryo 680 (Single-core)
3x 2.42GHz Kryo 680 (Triple-core)
4x 1.8GHz Kryo 680 (Quad-core)
GPU graphical controllerQualcomm Adreno 630 (710MHz)Qualcomm Adreno 660 (840MHz)
Performance (benchmark)AnTuTu: 292353 (v7), 352130 (v8)
Geekbench: 9065 (v4.4), 2170 (v5.1)
GFXBench: 30fps (ES 3.1 onscreen)
AnTuTu: 566529 (v8), 719696 (v9)
Geekbench: 3049 (v5.1)
GFXBench: 56fps (ES 3.1 onscreen)

💽 Memory and storage

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
RAM memory6GB LPDDR4X6GB LPDDR5
Internal storage128GB (110GB available)
UFS 2.1
128GB (97GB available)
UFS 3.1
External storageNot supportedNot supported

📶 Mobile networks

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
Dual-SIMDual-SIM Standby - Call active on one sim cardDual-SIM Standby - Call active on one sim card
SIM card2 slots (Dual-SIM)
nano-SIM (4FF)
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum Download / Upload600/50 Mbps2000/1024 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G, 5G
Frequency, bands Expand band details Collapse details
GSM MHz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkCDMA 800/1900, GSM 850/900/1800/1900GSM 850/900/1800/1900
Primary 3G networkGlobal version:
UMTS 800/850/900/1700/1800/1900/2100
China version:
CDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 850/900/1700/1900/2100
UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat11
VoLTE
Global version:
LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66)
TD-LTE (34, 38, 39, 40, 41)
China version:
LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 20)
TD-LTE (34, 38, 39, 40, 41)
LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28)
TD-LTE (34, 38, 39, 40, 41)
VoLTE
Primary 5G networkNot supportedSA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 78, 79)
Primary data networkGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-AGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
Secondary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Secondary 3G networkGlobal version:
UMTS 800/850/900/1700/1800/1900/2100
China version:
UMTS 850/900/1700/1900/2100
UMTS 850/900/1700/1900/2100
Secondary 4G networkLTE Cat11
VoLTE
Global version:
LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 66)
TD-LTE (34, 38, 39, 40, 41)
China version:
LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 20)
TD-LTE (34, 38, 39, 40, 41)
LTE Cat20 (1, 3, 3, 4, 5, 7, 8, 12, 20, 28)
TD-LTE (34, 38, 39, 40, 41)
VoLTE
Secondary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-AGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA

📷 Camera

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
Back camera (main camera)(dual camera)
12 megapixels
12MP telephoto 1/3.4"1.0µm
(triple camera)
12.2 megapixels
12MP ultrawide f/2.2123°13mm1/3"1.12µm
8MP telephoto f/2.476mm1/4.5"1.0µmPDAFOIS3x-optical-zoom
Main camera resolution4000x3000 pixels4032x3024 pixels
Video recording (primary)4K UHD (3840x2160) 60 fps4K UHD (3840x2160) 60 fps
FlashLED flash on both camerasLED flash
Focal aperturef/1.8 (aperture)f/1.8 (aperture)
Focal lengthfeature not registered26mm (lens)
Sensor size1/2.55" inches1/1.76" inches
Pixel size1.4µm pixel1.8µm pixel
AutofocusPDAF: phase detection autofocusPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationOIS (4-axis): Optical stabilizationOIS: Optical stabilization
ZoomDigital and optical zoomDigital and optical zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorSupportedSupported
HDRHDR photo on both camerasHDR photo/video on both cameras
Camera extras4K@30/60fps
1080p@30/60/960fps
4K@30/60fps
1080p@30/60fps
1080p@240fps (slow motion)
720p@960fps (slow motion)

📸 Front camera

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
Front camera (secondary)(dual front camera)
24 megapixels
2MP depth
32 megapixels
Front camera resolution5656x4224 pixels6528x4896 pixels
Video recording (secondary)Full HD (1920x1080)4K UHD (3840x2160)
Front flashLEDNot supported
Focal aperturef/2.0 (aperture)f/2.2 (aperture)
Focal length26mm (lens)26mm (lens)
Sensor size1/2.8" inches1/2.74" inches
Pixel size0.9µm pixel0.8µm pixel

🔉 Sound and multimedia

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
LoudspeakerMono sound (not stereo)Stereo sound
32-bit/384kHz
Dolby Atmos
Tuned by AKG
Active noise cancellation2 microphones or more2 microphones
RadioNot supportedNot supported
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviD, MKVMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC

🔌 Connectivity

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
USBUSB 2.0 Type-C, USB OTG On-The-GoUSB 3.2 Type-C, USB OTG On-The-Go
Audio outputType-C jack with 3.5mm jack adapterType-C reversible connector
TV outputUSB Type-C (reversible)USB Type-C SlimPort®
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
DLNANot supportedSupported
GPSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFCSupportedSupported
Infrared portNot supportedNot supported

🧭 Sensors

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
SensorsAccelerometer
Ambient light sensor
Compass
Face unlock 2D
Fingerprint sensor (rear-mounted)
Gyroscope
Virtual proximity sensor
Accelerometer
Ambient light sensor
Barometer
Compass
Face unlock 2D
Fingerprint sensor (under display)
Gyroscope
Hall effect
Proximity sensor
Vibrating alertSupportedSupported

🔋 Battery

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
Battery typeLi-Ion: lithium-ion (Non removable)LiPo: li-ion polymer (Non removable)
Battery capacity3200 mAh4500 mAh
Charger, watts18W Wired fast charging
Quick Charge 4
25W Wired fast charging
Reverse charging by cable
USB Power Delivery 3.0
Inductive / wireless charging10W Qi wireless charging15W Qi wireless charging
4.5W Reverse wireless charging
Talk time autonomyfeature not registeredfeature not registered
Standbyfeature not registeredfeature not registered

➕ Other features

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
Call controlVoice dialing, Voice recorderVoice dialing, Voice recorder, Voice commands
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardNot supportedNot supported
Miscellaneous• Colors: Onyx Black, Jade Green, Sapphire Blue
• Mechanical pop-up front camera
• Colors: Graphite, White, Lavender, Olive

☢️ Radiation rate

Xiaomi Mi Mix 3 (128GB/6GB)Galaxy S21 FE (SM-G990U 128GB)
SAR 1.6W/kg (USA, Mexico, etc.)1.45W/kg (head), 1.57W/kg (body)0.77W/kg (head), 0.9W/kg (body)
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
X

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